package com.example.demo.controller;

import org.springframework.stereotype.Component;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;

@Component
public class TestWebSocketController extends TextWebSocketHandler {
    @Override
    public void afterConnectionEstablished(WebSocketSession session) throws Exception {
        //这个方法会在WebSocket连接建立成功后,被自动调用
        System.out.println("TestWebSocketController 连接成功!");
    }
    @Override
    protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
        //这个方法是在WebSocket收到消息的时候,被自动调用
        System.out.println("TestWebSocketController 收到消息!" + message.toString());
        //session是个会话
        //里面就记录了通信双方是谁
        //session中就持有了webSocket的通信连接
        session.sendMessage(message);
    }
    @Override
    public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {
        //这个方法会在连接出现异常的时候,被自动调用
        System.out.println("TestWebSocketController 连接异常!");
    }
    @Override
    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
        //这个方法会在连接正常关闭之后,被自动调用
        System.out.println("TestWebSocketController 连接关闭!");
    }
}
